Recognizing the need for more manpower in preventive mental health, this project sought to demonstrate the feasibility of training police in techniques of intervention in family disturbances, in order to improve mental health and reduce violence. After 2 months of preparation, including a 160-hour on-campus course, the 18 police volunteers were assigned to an experimental precinct in New York City. During the last 4 months of the 2-year project, evaluation was conducted by comparison with a control precinct with similar characteristics. The project showed that training can reduce violence, improve personal safety of police officers, strengthen community relations, and increase police morale and job satisfaction. (BH)